freemark自定义标签类注入spring 的service-优快云博客

本文介绍了一种在Spring框架中高效获取Bean的方法，通过自定义工具类SpringBeanUtil实现，并展示了如何在Freemarker标签类中应用该工具类来初始化业务逻辑所需的Service实例。

package com.orchid.system.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
@Component
public class SpringBeanUtil  implements ApplicationContextAware {
	 private static ApplicationContext   applicationContext;


	@Override
	public void setApplicationContext(ApplicationContext ac)
			throws BeansException {
		applicationContext = ac;

		
	}
	public static Object getBean(String name) throws BeansException{
		        return applicationContext.getBean(name);
		    }

}

注意这里一点要加注解@component

然后是web.xml

	<listener>
		<listener-class>com.orchid.system.util.SpringBeanUtil</listener-class>
	</listener>

然后是freemarker自定义标签的类

	private ContentReleaseService contentReleaseService;
	
	public AdListDirective(){
		if(contentReleaseService==null)
		this.contentReleaseService=(ContentReleaseService) SpringBeanUtil.getBean("contentReleaseServiceImpl");
	}

new classpathxmlapplicationcontext（）不知为何会报堆满了，还是这种方式获取bean很好。

还是shiro需要获取service的时候，也可以这样获取